Answer:
D.
Explanation:
Viruses are oftentimes short lasted and disappear quickly.
Theory because a theory is a well substantiated explanation of how a particular phenomenon works based on the set of facts which had been repeatedly confirmed through observations and experiments. A scientific theory gives reliable account of a phenomenon.
Answer: Asexual reproduction
Asexual reproduction is a mode of reproduction in which a single parent is involved to produce the offsprings. This occurs in simple organisms. This does not requires formation of gametes like sexual reproduction. The offsprings are identical to the parent organism. Here, mother colony of protists, volvox gives birth to daughter as only single parent is involved it is a asexual mode of reproduction.
<span>Dense connective tissue</span>
